module.exports = {
	trim(str, pos = 'both') {
		if (pos == 'both') {
			return str.replace(/^\s+|\s+$/g,"");
		} else if(pos == "left") {
			return str.replace( /^\s*/, '');
		} else if(pos == 'right') {
			return str.replace(/(\s*$)/g, "");
		} else if(pos == 'all'){
			return str.replace(/\s+/g,"");
		} else {
			return str;
		}
	}
};
